Cal. Civ. Code § 4753

4753.    (a) For the purposes of this section, “clothesline” includes a cord, rope, or wire from which laundered items may be hung to dry or air. A balcony, railing, awning, or other part of a structure or building shall not qualify as a clothesline. (b) For the purposes of this section, “drying rack” means an apparatus from which laundered items may be hung to dry or air. A balcony, railing, awning, or other part of a structure or building shall not qualify as a drying rack. (c) Any provision of a governing document, as defined in Section 4150, shall be void and unenforceable if it effectively prohibits or unreasonably restricts an owner’s ability to use a clothesline or drying rack in the owner’s backyard. (d) (1) This section does not apply to provisions that impose reasonable restrictions on an owner’s backyard for the use of a clothesline or drying rack. (2) For purposes of this section, “reasonable restrictions” are restrictions that do not significantly increase the cost of using a clothesline or drying rack. (3) This section applies only to backyards that are designated for the exclusive use of the owner. (e) Nothing in this section shall prohibit an association from establishing and enforcing reasonable rules governing clotheslines or drying racks.